Anti-Thyroglobulin Antibody (ATG) test, also known as the Anti-TG test, measures the levels of antibodies against thyroglobulin, a protein found in thyroid cells. Elevated levels of Anti-TG can indicate autoimmune thyroid disorders, such as Hashimoto's thyroiditis or Graves' disease.
Symptoms of high Anti-TG levels may include fatigue, constipation, depression, dry and pale skin, and high cholesterol, all of which can signal an underlying thyroid imbalance.